I really can't make my mind up... To SSD or Not SSD? 
My current system (i5, HD5850) has 2x WD Caviar Blacks (640gb) in Raid1.
At the moment these act as my OS and file storage, whilst I try and keep file storage / odds and ends to a minimum and keep them on my other system (although it's not been turned on for a few days due it being slow and noisy).
The system is fast, obviously a tad slower since putting software / games on there, but still decently nippy. I was wondering as to what increase in performance an SSD will give me?
I've read about TRIM, and the different types of drives.. I'm still lost
I'm not sure what ssd I'd get, whats best. Anyone?

My current system (i5, HD5850) has 2x WD Caviar Blacks (640gb) in Raid1.
At the moment these act as my OS and file storage, whilst I try and keep file storage / odds and ends to a minimum and keep them on my other system (although it's not been turned on for a few days due it being slow and noisy).
The system is fast, obviously a tad slower since putting software / games on there, but still decently nippy. I was wondering as to what increase in performance an SSD will give me?
I've read about TRIM, and the different types of drives.. I'm still lost

I'm not sure what ssd I'd get, whats best. Anyone?